Base station, mobile terminal, and communications method
First Claim
1. A base station to which Orthogonal Frequency Division Multiplexing/Orthogonal Frequency Division Multiple Access is applied, the base station communicating with a mobile terminal according to Time Division Duplex, wherein a transmission frame in Time Division Duplex includes a downlink subframe and an uplink subframe, the base station comprising:
- a plurality of antennas;
a radio communications part configured to transmit the downlink subframe through a first one of the antennas and to receive an initial ranging code transmitted by the mobile terminal in a preallocated ranging region in the downlink subframe through a second one of the antennas during the transmission of the downlink subframe; and
a ranging processing part configured to perform ranging based on the initial ranging code received by the radio communications part.
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0 Petitions
Accused Products
Abstract
A base station, to which Orthogonal Frequency Division Multiplexing/Orthogonal Frequency Division Multiple Access is applied, communicates with a mobile terminal according to Time Division Duplex, in which a transmission frame includes a downlink subframe and an uplink subframe. The base station includes multiple antennas; a radio communications part configured to transmit the downlink subframe through a first one of the antennas and to receive an initial ranging code transmitted by the mobile terminal through a second one of the antennas during the transmission of the downlink subframe; and a ranging processing part configured to perform ranging based on the initial ranging code received by the radio communications part.
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Citations
8 Claims
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1. A base station to which Orthogonal Frequency Division Multiplexing/Orthogonal Frequency Division Multiple Access is applied, the base station communicating with a mobile terminal according to Time Division Duplex, wherein a transmission frame in Time Division Duplex includes a downlink subframe and an uplink subframe, the base station comprising:
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a plurality of antennas; a radio communications part configured to transmit the downlink subframe through a first one of the antennas and to receive an initial ranging code transmitted by the mobile terminal in a preallocated ranging region in the downlink subframe through a second one of the antennas during the transmission of the downlink subframe; and a ranging processing part configured to perform ranging based on the initial ranging code received by the radio communications part. - View Dependent Claims (2, 3)
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4. A mobile terminal to which Orthogonal Frequency Division Multiplexing/Orthogonal Frequency Division Multiple Access is applied, the mobile terminal communicating with a base station according to Time Division Duplex, wherein a transmission frame in Time Division Duplex includes a downlink subframe and an uplink subframe, the mobile terminal comprising:
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a plurality of antennas; and a radio communications part configured to receive the downlink subframe through a first one of the antennas and to transmit an initial ranging code using a preallocated ranging region in the downlink subframe through a second one of the antennas during the reception of the downlink subframe. - View Dependent Claims (5, 6, 7)
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8. A method of performing communications according to Time Division Duplex, to which method Orthogonal Frequency Division Multiplexing/Orthogonal Frequency Division Multiple Access is applied, wherein a transmission frame in Time Division Duplex includes a downlink subframe and an uplink subframe, the method comprising:
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a base station transmitting the downlink subframe through a first one of first antennas thereof; a mobile terminal receiving the downlink subframe through a first one of second antennas thereof; the mobile terminal transmitting an initial ranging code using a preallocated ranging region in the downlink subframe through a second one of the second antennas thereof; the base station receiving the initial ranging code transmitted by the mobile terminal in the preallocated ranging region in the downlink subframe through a second one of the first antennas thereof during the transmission of the downlink subframe; and the base station performing ranging based on the received initial ranging code.
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Specification